Growth and characterization of novel rhodamine B dye-doped adipic acid crystals for frequency conversion applications
摘要
The first effective growth of optical grade single crystals with a pink color was achieved by selectively doping adipic acid mother solution with rhodamine B (RhB) dye chemical. The harvested 0.06 g rhodamine dye-doped adipic acid crystal size measurement (ADRO3) is 6 × 4 × 3 mm3. Inspection by single-crystal X-ray diffraction (SXRD), powder X-ray diffraction (PXRD), High-resolution X-ray diffraction (HRXRD), Fourier transform Infrared spectroscopy (FTIR), and Energy-dispersive X-ray analysis (EDAX) confirms the introduction of dopant species into the developed crystalline matrix. Both the slow solvent evaporation technique (SEST)-grown adipic acid crystal and rhodamine B dye-doped adipic acid crystal samples exhibit a reasonably good crystalline nature, with the sharp peak’s full width at half maximum (FWHM) measuring 38.43 and 46.33 arc sec, respectively. The emergence of the rhodamine b (RhB) dye absorption peak caused a dramatic fall in the transmittance % of the UV spectrum around 480–490 nm (n to π* transition peak). The π to π* transition is linked to the wavelength region of 555 nm (ADRO1 to ADRO5), which is where the absorption peak of rhodamine B (RhB) is located. Around the small absorption peak, the wavelength range of 259 nm corresponds to the n to π* transition. The Tauc plot band gap energy suddenly decreased from 6.52 to 5.18 eV due to the addition of dye dopant species. The Kurtz NLO experiment validates the SHG efficiency value from 2.72 to 2.65 mV. TG–DTA thermograms show an increase in the melting temperature between the ranges 155 and 157 °C.